I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
pinup
pinup lineup sannup sunup tuneup
pin pain spinny spine pein pian piano pina pine piney pinna pinnae pinny piny pion epinaoi opine spin spinney spiny